Weird... fraternal twins share placenta...?

MamaCrystal · October 2010

Not a fused placenta, but ONE placenta.

A post below had me frustrated when women were saying their doctors couldn't say for sure whether their monochorionic twins were ID (thinking "Well, of course they're ID!")

...So I Googled ; ) and found this article. Very interesting... has me a little confused ; ) Notice the part where it says the twins originally tested 99.9% identical, then later were confimed NOT identical. Is this for real??

ktspj · October 2010

Wow..that is really interesting.

ethansbride2b · October 2010

This was brought up in a post that I responded to a while back. I'm not sure if anyone remembers, but my MFM told us that my girls shared a placenta and that there was a 20% chance they were identical. I went on my merry way and really didn't think much about it (or care ) if they were. I had 4 mature eggs, so I just assumed they were fraternal. I admit, I really didn't research it at all. Embarrassed

Some ladies on the board told me that the placentas probably fused, but my MFM never said anything about fusing. He just said it was shared. My girls were not identical afterwards.

Edit: I forgot to add that they were obviously in seperate sacs from the start.

ethansbride2b · October 2010

Just read the article. I didn't have IVF. I think he just left out the fused part. There is no way the statistical chance that he told me would be that high. From the article, it still seems like is rarely occurs.

macchiatto · October 2010

That's so weird! Though since it sounds like there is only one well-documented case of this, and it was with test tube babies, I think it's kind of like the whole "boy-girl twins can be ID," where it's rare enough that you don't normally need to think of it as a possibility.

Temp6313048411121614 · October 2010

First I was thinking that it was the uber-rare b/g ID's, but apparently not. Does it bug anyone else that the term "test tube baby/ies" is used 3 or 4 times in that article. That term just doesn't sound very smart at all, seems like a very uneducated term.

macchiatto · October 2010

It just sounds like a dated term to me. The reason I repeated that term from the article is b/c I honestly wasn't sure exactly what it meant; if it refers to IVF in general or something more specific or what.

pea-kay · October 2010

macchiatto:
That's so weird! Though since it sounds like there is only one well-documented case of this, and it was with test tube babies, I think it's kind of like the whole "boy-girl twins can be ID," where it's rare enough that you don't normally need to think of it as a possibility.

this, exactly. it seems like just one of those rare flukes. i think, generally speaking, we can say that if someone comes on here with one clear gestational sac and two or more babies within, they're carrying identicals.

pea-kay · October 2010

(hope that didn't sound snarky! that article was very interesting!)

MamaCrystal · October 2010

pea-kay:

macchiatto:
That's so weird! Though since it sounds like there is only one well-documented case of this, and it was with test tube babies, I think it's kind of like the whole "boy-girl twins can be ID," where it's rare enough that you don't normally need to think of it as a possibility.

this, exactly. it seems like just one of those rare flukes. i think, generally speaking, we can say that if someone comes on here with one clear gestational sac and two or more babies within, they're carrying identicals.

Oh, I agree that it would be extremely rare. It's just interesting to know that it CAN happen, and it makes me wonder how exactly it does. It's cool to think about genetically-different twins sharing a blood supply in utero. I also find it fascinating that the boy and girl DNA appeared identical in their blood, but their skin told a different story. Just crazy! : )

pea-kay · October 2010

yeah, i was just saying that because you know we get people here sometimes who just HAVE to disagree with you when you say that all b/g twins are fraternal. ::eyeroll::

macchiatto · October 2010

pea-kay:
yeah, i was just saying that because you know we get people here sometimes who just HAVE to disagree with you when you say that all b/g twins are fraternal. ::eyeroll::

LOL yep, that's what I was thinking of, too.

But I agree it is really interesting how their DNA came up as identical. So weird.

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